I mean, it's not as if you were sticking around to prove that it was fake. Nor did you ever state that it was a clearly fabricated list, and therefore called into question the integrity of the original poster. And neither would you have gloated if it had turned out to be fake. So you shouldn't apologise, and I'd hate to think that you would ever even think of doing so.

Nevermind all those who call for you to come back and make an apology. I say poo to them for having such gall, and call for everyone to wish you a Merry Christmas.